Spatial Clustering from GALEX-SDSS Samples: Star Formation History and Large-Scale Clustering
Creators
- Heinis, Sébastien1
- Budavári, Tamás1
- Szalay, Alex S.1
- Arnouts, Stéphane2
- Aragόn-Calvo, Miguel A.1
- Wyder, Ted K.3
- Barlow, Tom A.3
-
Foster, Karl3
- Peter, Friedman G.3
-
Martin, D. Christopher3
-
Morrissey, Patrick3
- Neff, Susan G.4
- Schiminovich, David5
-
Seibert, Mark6
-
Bianchi, Luciana1
- Donas, José7
- Heckman, Timothy M.1
- Lee, Young-Wook8
-
Madore, Barry F.6
- Milliard, Bruno7
-
Rich, R. Michael9
- Yi, Sukyoung K.8
-
1.
Johns Hopkins University
-
2.
Canada–France–Hawaii Telescope
-
3.
California Institute of Technology
-
4.
Goddard Space Flight Center
-
5.
Columbia University
-
6.
Carnegie Observatories
-
7.
Laboratoire d'Astrophysique de Marseille
-
8.
Yonsei University
-
9.
University of California, Los Angeles
Abstract
We measure the projected spatial correlation function w_p (r_p ) from a large sample combining Galaxy Evolution Explorer ultraviolet imaging with the Sloan Digital Sky Survey spectroscopic sample. We study the dependence of the clustering strength for samples selected on (NUV – r)_(abs) color, specific star formation rate (SSFR), and stellar mass. We find that there is a smooth transition in the clustering of galaxies as a function of this color from weak clustering among blue galaxies to stronger clustering for red galaxies. The clustering of galaxies within the "green valley" has an intermediate strength, and is consistent with that expected from galaxy groups. The results are robust to the correction for dust extinction. The comparison with simple analytical modeling suggests that the halo occupation number increases with older star formation epochs. When splitting according to SSFR, we find that the SSFR is a more sensitive tracer of environment than stellar mass.
Additional Information
© 2009. The American Astronomical Society. Received 2008 December 8; accepted 2009 April 21; published 2009 June 4. We thank Ching-Wa Yip for useful discussions. GALEX (Galaxy Evolution Explorer) is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASAs support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d(tm)Etudes Spatiales of France and the Korean Ministry of Science and Technology.Attached Files
Published - Heinis2009p4610Astrophys_J.pdf
Files
Heinis2009p4610Astrophys_J.pdf
Files
(449.1 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:95b04c4485feac218c0c30e9ce19494e
|
449.1 kB | Preview Download |
Additional details
Identifiers
- Eprint ID
- 15415
- Resolver ID
- CaltechAUTHORS:20090828-130619755
Funding
- NASA
Dates
- Created
-
2009-09-11Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field